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andre [41]
2 years ago
6

At a particular music store, CDs are on sale at $12.00 for the first one purchased and $9.00 for each additional disc purchased.

Maria spends $84.00 on CDs. How many CDs has Maria purchased?
Mathematics
2 answers:
kondor19780726 [428]2 years ago
8 0
Maria bought 9 CDs. Hope I helped :)
Elanso [62]2 years ago
8 0

Answer:

Maria purchased 9 CDs

Step-by-step explanation:

Maria spends $84.00 on CDs. The first CD is $12,  the rest $9

As the CD have different price ,  first we have to discount the price of the first one,  and then we divide the rest by $9

Price First CD = $12 ,

We buy the first ,  so we get the rest of money  84-12=72

Price Rest =$9 ,  with the money that left ,  we can buy 72/9= 8

Total= 1 +8 =9

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2. Lawn tickets cost $30 each and seat tickets cost $50
Andreas93 [3]
Okay so.
If lawn tickets are $30 and seat tickets are $50 and they sold 200 seat tickets.
50 multiplied by 200 is = $ 10,000
And the goal is $14,000.
So $14,000 subtract $10,000 is $4000
$4000 is how much they made in Lawn Tickets. In order to calculate how much lawn tickets were sold, is dividing $4000 by $30 since lawn tickets are $30.
4000 divided by $30 = 133
Not sure if this is correct but all the working and steps are correct! Hope this helps.
6 0
2 years ago
I WILL GIVE BRAINLIST
GrogVix [38]

Answer:

3,406.5 litres/hr

Step-by-step explanation:

The liquid is being poured at a rate of 15 gallons per minute.

1 minute = 1/60 hour

Thus, the rate can be written as:

15 gallons pet 1/60 hour

We are told that one gallon is approximately 3.785 liters.

Thus;

15 gallons = 15 × 3.785 litres = 56.775 litres.

Thus, the rate is;

56.775 litres per 1/60 hour

We want to find in litres/hr.

By proportion, we have it as;

(56.775 ÷ 1/60)/1 = 56.775 × 60 = 3,406.5 litres/hr

4 0
3 years ago
Which is the correct comparison of solutions for 2x + 6 < 10 and -2x + 22 < 18?
Ronch [10]

IDK. I looked up the answer but i couldn't find it. I'm on UsaTestPrep and they gave me the same question.

5 0
3 years ago
The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +
lianna [129]
You have a system of equations \left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right..

1. Substitude right side of second equation into the left side of the first equation: -6x+6=-x^2+2x-9.

2. Solve this equation:
 x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4,  \\ \sqrt{D}=2,  \\ x_{1,2}=\dfrac{8\pm 2}{2  } =3,5.

3. Find y:
for x_1=3, y_1=-6\cdot 3+6=-18+6=-12,
for x_2=5, y_2=-6\cdot 5+6=-30+6=-24.

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.


7 0
3 years ago
Read 2 more answers
What’s the value of the ratio 21:45
hichkok12 [17]

Answer:

im not sure but I think it's 1.5

3 0
3 years ago
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